Raise the glass so it's the same height as behind the net. That way if the puck is shot over, you know it's on purpose.
Keep the trapezoid as a safe zone. Goaile can play puck outside the trapezoid but is not considered untouchable.
Keep o/t and s/o but change point system to 3 point games, whereby you don't get a point for losing.
Reg or O/T win :3 pts. S/O win: 2 pts. Reg or O/T loss: 0 pts. S/O loss: 1 pt.
Change icing :
Puck shot from inside your defensive zone blue line: ICING.
This is usually where you are trying to ice the puck.
Puck shot outside your blueline: NO ICING.
This is usually a missed pass or bad judgement on part of player or linesman.